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Stone hammer well drilling.PNG

5 October 2013

• Winona

  Winona uploaded a new version of "File:Stone hammer well drilling.PNG"

  06:52

3 April 2013

• Winona

  uploaded a new version of "File:Stone hammer well drilling.PNG"

  01:08

9 May 2012

• Winona

  uploaded a new version of "File:Stone hammer well drilling.PNG"

  22:13

30 July 2007

• Bjelkeman

  Stone hammer well drilling. Drilling a 20 m well in Chinandega, Nicaragua, with the Rota-sludge method. Insert left: Rota-sludge drilling head. Insert right: Stones extracted with Rota-sludge.

  18:26

  +192